Received: 9 June 2020
Accepted: 25 January 2021
First Online: 19 February 2021
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board and the Ethics Committee of Shanghai Children’s Medical Center (SCMCIRB-K2019060-1), and written informed consent was obtained from the parents of each patient. Yong Yin was granted permission to access raw data by Shanghai Children’s Medical Center.
: Not applicable.
: The authors declare that they have no competing interests.